First Mod:
This mod adds a "Print Thread" image button to the bottom of
printthread.php. When the user clicks on it, the print screen box appears.
There is a "Print Thread" image included in the .zip file.

Second Mod:
This mod adds a popup box whenever printthread.php is opened, and asks the
user if they would like to print. This box appears after the user clicks
on "View a Printable Version" on showthread.php.